CN109611872B - Method and device for reducing nitrogen oxides generated by boiler combustion - Google Patents
Method and device for reducing nitrogen oxides generated by boiler combustion Download PDFInfo
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- CN109611872B CN109611872B CN201811478889.9A CN201811478889A CN109611872B CN 109611872 B CN109611872 B CN 109611872B CN 201811478889 A CN201811478889 A CN 201811478889A CN 109611872 B CN109611872 B CN 109611872B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
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Abstract
The invention relates to the technical field of boiler combustion control, and provides a method and a device for reducing nitrogen oxides generated by boiler combustion, wherein the method comprises the following steps: obtaining the proportion of nitrogen oxides, combustible gases and combustion improver in the discharged flue gas; judging whether the adjustment object is the combustible gas or the combustion improver according to the theoretical optimal proportion of the combustible gas and the combustion improver; adjusting the air intake speed of the adjustment object; obtaining the proportion of the nitrogen oxide, the combustible gas and the combustion improver in the discharged flue gas again, and judging whether the proportion of the nitrogen oxide is increased or not; when the proportion of the nitrogen oxides is increased, stopping adjusting the air intake speed of the adjusting object; the gas inlet speed of the combustible gas or the combustion improver is adjusted in real time, so that the proportion of nitrogen oxides in the discharged flue gas is reduced to the minimum, and the discharge amount of the nitrogen oxides can be effectively reduced; each boiler can obtain the optimal combustion mode under the operation state thereof, and the utilization rate of the fuel is improved, so that the boiler has strong universality.
Description
Technical Field
The invention relates to the technical field of boiler combustion control, in particular to a method and a device for reducing nitrogen oxides generated by boiler combustion.
Background
Nitrogen Oxides (NO) produced in boiler combustionxIncluding NO, NO2And N2O) is a more environmentally hazardous and more difficult to handle gas, and is essentially considered one of the major sources of atmospheric pollution, with the nitrogen oxides emitted worldwide by the combustion of fossil fuels accounting for a significant proportion of all nitrogen oxide emissions annually. N in nitrogen oxides2O may cause greenhouse effect (e.g., elevated temperature), NO and NO2Are believed to be important causes of ground ozone, photochemical smog, and acid rain formation. It is therefore an important and difficult task to reduce the content of nitrogen oxides in the flue gas of the boiler, and thus to reduce the emission of harmful gases of nitrogen oxides.
According to the generation mechanism of nitrogen oxides, the nitrogen oxides can be divided into thermal nitrogen oxides, fuel nitrogen oxides and rapid nitrogen oxides, wherein the thermal nitrogen oxides are generated by the mass oxidation of nitrogen in air when the temperature of a hearth is higher than 1350 ℃ in the combustion process, and the fuel nitrogen oxides are generated by the oxidation of nitrogen compounds in fuel in the combustion process; the fast nitrogen oxides are formed by combustion of hydrocarbons in the fuel and nitrogen in the air mixed in advance in the initial stage of combustion.
In order to reduce the emission of nitrogen oxides, most of the existing modes adopt a mode of installing emission reduction equipment, however, the design period of the emission reduction equipment is long, the emission reduction investment is large, the universality is low, and the emission reduction effect cannot be quickly achieved, so the use effect is not ideal.
Disclosure of Invention
The invention aims to provide a method for reducing nitrogen oxides generated by boiler combustion, and aims to solve the technical problems that the emission reduction effect cannot be quickly achieved by adopting emission reduction equipment and the use effect is not ideal in the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for reducing nitrogen oxides generated by combustion of a boiler is provided, which comprises the following steps:
obtaining the proportion of nitrogen oxides, combustible gases and combustion improver in the discharged flue gas;
calculating the theoretical optimal proportion of the combustible gas and the combustion improver according to the types of the combustible gas and the combustion improver, and obtaining the theoretical proportion of the combustible gas and the combustion improver in the flue gas discharged when the combustible gas and the combustion improver are combusted under the theoretical optimal proportion;
comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver, and judging that the adjustment object is the combustible gas or the combustion improver;
adjusting an intake air speed of the adjustment object;
obtaining the proportion of the nitrogen oxide, the combustible gas and the combustion improver in the discharged flue gas again, and judging whether the proportion of the nitrogen oxide is increased or not;
when the proportion of the nitrogen oxide is reduced, returning to the step of comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver, and judging that the adjustment object is the combustible gas or the combustion improver;
when the proportion of the nitrogen oxides increases, stopping adjusting the intake speed of the adjustment object, and maintaining the proportion of the combustible gas and the combustion improver at the previous time.
In one embodiment, in the step of adjusting the intake air speed of the adjustment object, the adjustment manner includes increasing the intake air speed of the adjustment object or decreasing the intake air speed of the adjustment object.
In one embodiment, the oxidizer is air.
Another object of the present invention is to provide an apparatus for reducing nitrogen oxides generated by combustion in a boiler, comprising:
the gas monitoring module is used for acquiring the proportion of nitric oxide, combustible gas and combustion improver in the discharged flue gas;
the first data storage module is used for calculating the theoretical optimal proportion of the combustible gas and the combustion improver according to the types of the combustible gas and the combustion improver, and obtaining and storing the theoretical proportion of the combustible gas and the combustion improver in the flue gas discharged when the combustible gas and the combustion improver are combusted under the theoretical optimal proportion;
the first data processing module is used for comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver and judging that the adjustment object is the combustible gas or the combustion improver;
the air inlet control module is used for adjusting the air inlet speed of the adjusting object;
the second data processing module is used for judging whether the proportion of the nitric oxide is increased or not according to the proportion of the nitric oxide, the combustible gas and the combustion improver in the obtained exhaust flue gas;
when the proportion of the nitrogen oxides is reduced, returning to the first data processing module, comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver, and judging that the adjustment object is the combustible gas or the combustion improver;
when the proportion of the nitrogen oxides is increased, the air inlet control module stops adjusting the air inlet speed of the adjusting object and maintains the proportion of the previous combustible gas and the combustion improver.
In one embodiment, the apparatus for reducing nitrogen oxides generated by combustion in a boiler further comprises:
and the second data storage module is used for storing the proportion of the nitrogen oxide, the combustible gas and the combustion improver obtained by the gas monitoring module.
In one embodiment, the manner in which the intake air control module adjusts includes increasing the intake air speed of the adjustment subject or decreasing the intake air speed of the adjustment subject.
It is also an object of the invention to provide an electronic device,
comprises a processor;
and a memory storing computer-executable instructions;
the processor executes the executable instructions in the memory to implement the above-described method for reducing nitrogen oxides produced by combustion in a boiler.
It is also an object of the invention to provide a computer-readable storage medium,
which stores computer readable program instructions that, when executed by a processor, implement the above-described method for reducing nitrogen oxides produced by combustion in a boiler.
The method for reducing the nitrogen oxides generated by boiler combustion has the beneficial effects that: the proportion of the combustible gas and the combustion improver in the discharged flue gas is obtained and compared with the theoretical optimal proportion, and the adjustment object and the adjustment mode are confirmed, so that the gas inlet speed of the combustible gas or the combustion improver is adjusted in real time, the proportion of the combustible gas and the combustion improver is close to the theoretical optimal proportion, and finally the proportion of the nitric oxide in the discharged flue gas is reduced to the minimum, at the moment, the adjustment of the combustible gas or the combustion improver is equal to the actual optimal proportion, and the discharge amount of the nitric oxide can be effectively reduced. Meanwhile, the proportion of the combustible gas and the combustion improver can be adjusted for each boiler, so that each boiler can obtain the optimal combustion mode in the running state, the utilization rate of the fuel is improved, the adjusting process is quick, and the adjusting period is short, so that the method has strong universality and can be widely applied.
Drawings
In order to more clearly illustrate the embodiments or the prior art solutions of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a first schematic flow chart of a method for reducing nitrogen oxides generated by combustion of a boiler according to an embodiment of the present invention;
FIG. 2 is a second schematic flow chart of a method for reducing nitrogen oxides generated by combustion in a boiler according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for reducing nitrogen oxides generated by combustion in a boiler according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail and completely with reference to the following embodiments and accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a method for reducing nitrogen oxides generated by combustion in a boiler includes the following steps:
step S10: obtaining the proportion of nitrogen oxides, combustible gases and combustion improver in the discharged flue gas;
step S20: judging whether the adjustment object is the combustible gas or the combustion improver according to the theoretical optimal proportion of the combustible gas and the combustion improver;
step S30: adjusting the air intake speed of the adjustment object;
step S40: obtaining the proportion of the nitrogen oxide, the combustible gas and the combustion improver in the discharged flue gas again, and judging whether the proportion of the nitrogen oxide is increased or not;
step S50: when the proportion of nitrogen oxides increases, the adjustment of the intake air speed of the adjustment target is stopped.
In the above step S20, the theoretical optimum ratio of the combustible gas to the combustion improver is obtained in advance by calculation based on the combustion theory, and is used as a basis for adjustment, which guides how to select and adjust the adjustment target.
In step S50, when the ratio of the nitrogen oxide in the flue gas after the last adjustment is higher than the ratio of the nitrogen oxide in the flue gas after the last adjustment, it means that the adjustment of the combustible gas or the combustion improver has reached the actual optimum ratio, and no adjustment is needed, and therefore, the adjustment of the intake speed of the adjustment target is stopped.
At present, in order to reduce the emission of nitrogen oxides, an emission reduction device is generally installed, and although the emission of nitrogen oxides can be reduced, the combustion process of combustible gas is not adjusted, and only combustion products are treated, so that the utilization rate of the combustible gas cannot be improved. Meanwhile, the emission reduction equipment has long design period, large emission reduction investment and low universality, and cannot adjust the combustion characteristics of each boiler, so that the emission reduction effect cannot be quickly achieved, and the use effect is not ideal.
However, the present embodiment provides a completely different approach to reducing the nitrogen oxides produced by boiler combustion. The proportion of the combustible gas and the combustion improver in the discharged flue gas is obtained and compared with the theoretical optimal proportion, and the adjustment object and the adjustment mode are confirmed, so that the gas inlet speed of the combustible gas or the combustion improver is adjusted in real time, the proportion of the combustible gas and the combustion improver is close to the theoretical optimal proportion, and finally the proportion of the nitric oxide in the discharged flue gas is reduced to the minimum, at the moment, the adjustment of the combustible gas or the combustion improver is equal to the actual optimal proportion, and the discharge amount of the nitric oxide can be effectively reduced. Meanwhile, the proportion of the combustible gas and the combustion improver can be adjusted for each boiler, so that each boiler can obtain the optimal combustion mode in the running state, the utilization rate of the fuel is improved, the adjusting process is quick, and the adjusting period is short, so that the method has strong universality and can be widely applied.
The following describes each step of the method for reducing nitrogen oxides generated by boiler combustion according to the present embodiment in detail.
Referring to fig. 2, in an embodiment, step S10 is preceded by:
step S01: and calculating the theoretical optimal ratio of the combustible gas to the combustion improver according to the types of the combustible gas and the combustion improver.
In particular, the combustible gas may be chosen according to the needs, for example it may be coal gas or natural gas, and depending on the type of combustible gas, it may contain different main combustibles, for example the main combustible in coal gas is carbon monoxide (CO) and the main combustible in natural gas is methane (CH)4) And the combustion processes of the two are completely different, so the theoretical optimal proportion of the combustion improver to the combustion improver is different, and the combustion improver needs to be calculated and determined according to the combustion theory. Of course, the combustion process of the combustible gas is different according to the type of the combustion improver, and in this embodiment, the combustion improver is preferably air, and oxygen in the air can be used for assisting the combustion of the combustible gas.
It should be understood that the theoretical optimum ratio of the combustible gas and the combustion improver referred to herein is obtained by theoretical calculation, and in practical applications, depending on the combustion conditions and environment, the actual optimum ratio may be different from the theoretical optimum ratio, so that the theoretical optimum ratio can be used as a basis and guide for adjusting the ratio of the combustible gas and the combustion improver.
In one embodiment, the ratio of the nitrogen oxide, the combustible gas and the combustion improver in the exhaust flue gas obtained in step S10 can be obtained by a professional gas monitor provided at the exhaust site of the flue gas. The nitrogen oxide is non-ideal emission, and the emission amount of the nitrogen oxide needs to be reduced as much as possible, so that the content change of the nitrogen oxide can be monitored in real time through a gas monitor, and a judgment basis is provided for judging whether the subsequent adjustment result is reasonable. According to the obtained gas content obtained by the gas monitor, the proportion of the combustible gas and the combustion improver in the flue gas can be calculated, so that a basis is provided for subsequent comparison and judgment.
In one embodiment, in step S20, when the combustible gas and the combustion improver are combusted at a theoretically optimal ratio according to the combustion theory, the theoretical ratio of the combustible gas to the combustion improver in the exhaust smoke can be obtained. The proportion of the combustible gas and the combustion improver in the flue gas is compared with the theoretical proportion of the combustible gas and the combustion improver, so that the condition that the air inlet speed of the combustible gas or the air inlet speed of the combustion improver needs to be adjusted can be known, and the adjusting mode comprises the step of reducing or improving the air inlet speed of the combustible gas or the combustion improver.
For example, when the proportion of combustible gas in the flue gas is higher, it means that the combustible gas is insufficiently combusted, which may be caused by too fast intake speed of the combustible gas on the one hand and too slow intake speed of the combustion improver on the other hand. Therefore, it is possible to determine that the combustible gas or the combustion improver is adjusted at this time. When the adjustment object is determined to be a combustible gas, it means that the intake speed of the combustible gas needs to be reduced; when the adjustment target is determined as the oxidizer, it means that the intake velocity of the oxidizer needs to be increased.
For example, when the proportion of combustible gas in the flue gas is low, on one hand, the intake speed of the combustible gas may be too slow, resulting in too fast consumption of the combustible gas; another aspect may be caused by too fast an induction rate of the oxidizer. Therefore, it is possible to determine that the combustible gas or the combustion improver is adjusted at this time. When the adjustment object is determined to be a combustible gas, the adjustment object means that the intake speed of the combustible gas needs to be increased; when the adjustment target is determined as the oxidizer, it means that the intake velocity of the oxidizer needs to be reduced.
After the adjustment object is determined, the corresponding substance needs to be adjusted. In step S30, the intake speed may be adjusted according to the diameter, opening, etc. of the intake port for different substances. For example, when the object to be adjusted is a combustible gas, the intake speed of the combustible gas needs to be increased or decreased according to the diameter and the opening degree of the intake port of the combustible gas. When the adjustment target is the combustion improver, the intake speed of the combustion improver needs to be reduced or increased according to the diameter and the opening of the intake port of the combustion improver.
After the steps S10 to S30 are completed, the first adjustment of the ratio of the combustible gas to the combustion improver is completed, and it is necessary to determine whether the emission amount of nitrogen oxides is reduced after the first adjustment, so that the emission amount of nitrogen oxides in the flue gas needs to be monitored again.
Referring to fig. 2, in an embodiment, in step S40, the ratio of the nitrogen oxide, the combustible gas and the combustion improver in the exhaust flue gas may be obtained again by the gas monitor, and the content of the nitrogen oxide obtained this time is compared with the content of the nitrogen oxide in the flue gas obtained last time, so as to determine whether the ratio of the nitrogen oxide is increased. If the proportion of nitrogen oxides is increased, which means that the proportion of combustible gas and combustion improver before adjustment is already the actual optimum proportion, and no adjustment is necessary, step S50 is performed to stop adjusting the intake speed of the adjustment object and maintain the proportion between combustible gas and combustion improver at the previous time. If the ratio of the nitrogen oxide is decreased, it means that the adjustment is effective to decrease the emission amount of the nitrogen oxide, and it means that it is impossible to determine whether the ratio of the nitrogen oxide can be further decreased, so that it is necessary to return to the step S20 to adjust the ratio of the combustible gas and the combustion improver again. By repeating the above process until the ratio of nitrogen oxides is no longer reduced compared with the previous regulation at the end, it means that the ratio of combustible gas and oxidizer regulated at the previous time is already the actual optimum ratio, at which point the regulation of the intake speed of the regulation object is stopped.
In the method for reducing the nitrogen oxide generated by the combustion of the boiler, the ratio of the combustible gas and the combustion improver in the discharged flue gas is obtained and compared with the theoretical optimal ratio to confirm the adjustment object and the adjustment mode, so that the intake speed of the combustible gas or the combustion improver is adjusted in real time, the intake speed of the combustible gas or the combustion improver can be adjusted for multiple times to achieve the actual optimal ratio, the content of the nitrogen oxide in the discharged flue gas is ensured to be reduced to the minimum, and the discharge amount of the nitrogen oxide is effectively reduced. Meanwhile, the proportion of the combustible gas and the combustion improver can be adjusted for each boiler, so that each boiler can obtain the optimal combustion mode in the running state, the utilization rate of the fuel is improved, the adjusting process is quick, and the adjusting period is short, so that the method has strong universality and can be widely applied.
Referring to fig. 3, the present embodiment further provides a device for reducing nitrogen oxides generated by boiler combustion, including a gas monitoring module 21, a first data processing module 22, an air intake control module 23, and a second data processing module 24, wherein the gas monitoring module 21 is configured to monitor the ratio of nitrogen oxides, combustible gases, and combustion improver in flue gas; the first data processing module 22 is configured to compare the ratio of the combustible gas to the combustion improver with a theoretically optimal ratio, and determine that the adjustment object is the combustible gas or the combustion improver; the air inlet control module 23 is used for adjusting the air inlet speed of the adjusting object; the second data processing module 24 is used to determine whether the proportion of nitrogen oxides is decreasing.
In one embodiment, the theoretical optimal ratio of combustible gas and combustion improver is calculated according to combustion theory, and can be used as a basis and guide for adjusting the ratio of combustible gas and combustion improver in the following process. The combustible gas can be selected according to the requirement, and the main combustible substances contained in the combustible gas are different according to the type of the combustible gas, for example, the main combustible substance in the coal gas is carbon monoxide, the main combustible substance in the natural gas is methane, and the combustion processes of the two are completely different, so that the theoretical optimal proportion of the combustible gas to the combustion improver is different, and the combustible gas and the combustion improver are required to be calculated and determined according to the combustion theory. Of course, the combustion process of the combustible gas is different according to the type of the combustion improver, and in this embodiment, the combustion improver is preferably air, and oxygen in the air can be used for assisting the combustion of the combustible gas.
In one embodiment, the apparatus for reducing nitrogen oxides generated by boiler combustion further comprises a first data storage module 25 for storing theoretical optimum ratios of combustible gases and combustion improvers, which can be inputted and stored after determination by combustion theory calculation, different combustible gases and different combustion improvers corresponding to different theoretical optimum ratios. The first data processing module 22 can retrieve the data in the first data storage module 25 when performing data processing.
In one embodiment, the gas monitoring module 21 may be selected from a gas monitor disposed at the exhaust of flue gas, which can measure the content of each component in the flue gas, including the content of nitrogen oxides, combustible gases, and combustion improvers. After it obtains the data for the gas species, it needs to be stored. The device for reducing the nitrogen oxides generated by the combustion of the boiler provided by the embodiment further comprises a second data storage module 26, which is used for storing the proportions of the nitrogen oxides, the combustible gases and the combustion improver obtained by the gas monitoring module 21. The first data processing module 22 may retrieve the data of nitrogen oxides in the second data storage module 26 during data processing. It should be understood that the first data processing module 22 also needs to retrieve the data of nitrogen oxides in the first data storage module 25 when it performs the first data processing.
In one embodiment, the manner in which the intake air control module 23 adjusts the intake air speed includes increasing the intake air speed of the adjustment target or decreasing the intake air speed of the adjustment target. The first data processing module 22 compares the ratio of the combustible gas to the combustion improver with the theoretically optimum ratio, so that it can be known whether the intake speed of the combustible gas or the intake speed of the combustion improver needs to be adjusted.
For example, when the proportion of combustible gas in the flue gas is higher, it means that the combustible gas is insufficiently combusted, which may be caused by too fast intake speed of the combustible gas on the one hand and too slow intake speed of the combustion improver on the other hand. Therefore, it is possible to determine that the combustible gas or the combustion improver is adjusted at this time. When the first data processing module 22 determines that the adjustment object is a combustible gas, it means that the intake control module 23 needs to be controlled to reduce the intake speed of the combustible gas; when the adjustment target is determined as the oxidizer, it means that it is necessary to control the intake control module 23 to increase the intake speed of the oxidizer.
For example, when the proportion of combustible gas in the flue gas is low, on one hand, the intake speed of the combustible gas may be too slow, resulting in too fast consumption of the combustible gas; another aspect may be caused by too fast an induction rate of the oxidizer. Therefore, it is possible to determine that the combustible gas or the combustion improver is adjusted at this time. When the first data processing module 22 determines that the adjustment object is a combustible gas, it means that the intake control module 23 needs to be controlled to increase the intake speed of the combustible gas; when the adjustment target is determined as the oxidizer, it means that it is necessary to control the intake control module 23 to reduce the intake speed of the oxidizer.
In one embodiment, the second data processing module 24 is configured to determine whether the proportion of NOx is decreasing. When the proportion of the nitrogen oxide is reduced, it is indicated that whether the proportion of the nitrogen oxide can be further reduced cannot be judged at this time, and at this time, the gas monitoring module 21 is required to continuously obtain the contents of the nitrogen oxide, the combustible gas and the combustion improver in the flue gas, and the above process is repeated; when the proportion of the nitrogen oxides is increased, it means that the proportion of the combustible gas and the combustion improver obtained by the intake control module 23 in the previous adjustment is the actual optimal proportion, and no adjustment is needed, and at this time, the intake control module 23 does not adjust the intake speed of the combustible gas and the combustion improver.
The working process of the device for reducing nitrogen oxides generated by combustion of the boiler provided by the embodiment can be as follows:
calculating a theoretical optimal ratio of the combustible gas and the combustion improver according to the types of the combustible gas and the combustion improver, and storing the theoretical optimal ratio in the first data storage module 25;
the gas monitoring module 21 acquires the proportion of nitrogen oxides, combustible gases and combustion improver in the discharged flue gas, and stores the data in the second data storage module 26;
the first data processing module 22 calls the theoretical optimal proportion stored in the first data storage module 25 and the proportion of the combustible gas and the combustion improver in the second data storage module 26, compares the theoretical optimal proportion and the proportion of the combustible gas and the combustion improver in the second data storage module, and judges that an adjustment object is the combustible gas or the combustion improver and a corresponding adjustment mode; and sends the adjustment instruction to the intake control module 23;
the air inlet control module 23 adjusts the air inlet speed of the adjustment object according to the adjustment instruction;
the gas monitoring module 21 obtains the proportion of the nitrogen oxide, the combustible gas and the combustion improver in the discharged flue gas again, and stores the data in the second data storage module 26;
the second data processing module 24 retrieves the proportion of the nitrogen oxides stored in the first data storage module 25 and the proportion of the nitrogen oxides stored in the second data storage module 26 to judge whether the content of the nitrogen oxides is reduced;
when the proportion of nitrogen oxides is reduced, the first data processing module 22, the air inlet control module 23, the gas monitoring module 21 and the second data processing module 24 repeat the processes;
when the proportion of nitrogen oxides increases, the intake control module 23 stops adjusting the intake speed of the combustible gas and the combustion improver.
The systems, devices, modules or units illustrated in the above embodiments may be implemented by a computer chip or an entity, or by a product with certain functions. One typical implementation device is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
For convenience of description, the above devices are described as being divided into various units or modules by function, respectively. Of course, the functionality of the units or modules may be implemented in the same one or more software and/or hardware when implementing the invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The invention may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
The embodiments of the present invention are described in a progressive manner, and the same and similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. A method for reducing nitrogen oxides produced by combustion in a boiler, comprising:
obtaining the proportion of nitrogen oxides, combustible gases and combustion improver in the discharged flue gas;
calculating the theoretical optimal proportion of the combustible gas and the combustion improver according to the types of the combustible gas and the combustion improver, and obtaining the theoretical proportion of the combustible gas and the combustion improver in the flue gas discharged when the combustible gas and the combustion improver are combusted under the theoretical optimal proportion;
comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver, and judging that the adjustment object is the combustible gas or the combustion improver;
adjusting an intake air speed of the adjustment object;
obtaining the proportion of the nitrogen oxide, the combustible gas and the combustion improver in the discharged flue gas again, and judging whether the proportion of the nitrogen oxide is increased or not;
when the proportion of the nitrogen oxide is reduced, returning to the step of comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver, and judging that the adjustment object is the combustible gas or the combustion improver;
when the proportion of the nitrogen oxides increases, stopping adjusting the intake speed of the adjustment object, and maintaining the proportion of the combustible gas and the combustion improver at the previous time.
2. The method for reducing nitrogen oxides generated by combustion in a boiler according to claim 1, wherein in the step of adjusting the intake air speed of the adjustment object, the adjustment manner includes increasing the intake air speed of the adjustment object or decreasing the intake air speed of the adjustment object.
3. The method for reducing the nitrogen oxides generated by the combustion of the boiler as claimed in any one of claims 1 to 2, wherein the combustion improver is air.
4. An apparatus for reducing nitrogen oxides produced by combustion in a boiler, comprising:
the gas monitoring module is used for acquiring the proportion of nitric oxide, combustible gas and combustion improver in the discharged flue gas;
the first data storage module is used for calculating the theoretical optimal proportion of the combustible gas and the combustion improver according to the types of the combustible gas and the combustion improver, and obtaining and storing the theoretical proportion of the combustible gas and the combustion improver in the flue gas discharged when the combustible gas and the combustion improver are combusted under the theoretical optimal proportion;
the first data processing module is used for comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver and judging that the adjustment object is the combustible gas or the combustion improver;
the air inlet control module is used for adjusting the air inlet speed of the adjusting object;
the second data processing module is used for judging whether the proportion of the nitric oxide is increased or not according to the proportion of the nitric oxide, the combustible gas and the combustion improver in the obtained exhaust flue gas;
when the proportion of the nitrogen oxides is reduced, returning to the first data processing module, comparing the proportion of the combustible gas and the combustion improver in the flue gas with the theoretical proportion of the combustible gas and the combustion improver, and judging that the adjustment object is the combustible gas or the combustion improver;
when the proportion of the nitrogen oxides is increased, the air inlet control module stops adjusting the air inlet speed of the adjusting object and maintains the proportion of the previous combustible gas and the combustion improver.
5. The apparatus for reducing nitrogen oxides generated by combustion in a boiler according to claim 4, wherein said apparatus for reducing nitrogen oxides generated by combustion in a boiler further comprises:
and the second data storage module is used for storing the proportion of the nitrogen oxide, the combustible gas and the combustion improver obtained by the gas monitoring module.
6. The apparatus for reducing nitrogen oxides generated by combustion in a boiler of claim 4, wherein the manner in which the intake air control module adjusts includes increasing the intake air speed of the adjustment object or decreasing the intake air speed of the adjustment object.
7. An electronic device, characterized in that,
comprises a processor;
and a memory storing computer-executable instructions;
the processor executes the executable instructions in the memory to realize the method for reducing the nitrogen oxides generated by the combustion of the boiler as claimed in any one of claims 1-3.
8. A computer-readable storage medium, characterized in that,
the computer-readable program instructions are stored, and when the program instructions are executed by a processor, the method for reducing nitrogen oxides generated by combustion of the boiler is realized according to any one of claims 1 to 3.
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